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marchaient No. 78,767, dated June 9, 186s.

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Be it known that I, EDWARD SPAULDING, of the city of Brooklyn, Kings county, and State of New ilYork, I

have invented new and useful Improvementsin Hanging of Mosquito-Screens and I do hereby ,declare that the following is a fullfolear, and exact description thereof, which willenable others skilled in the art to make' and use the same, reference being had to the accompanying drawings, forming part of this specication.

My invention relates to the hanging of self-acting screens orvnlosqnitolnettings, or such as are `used to .close a door or window-opening, and when not so required are wound npon' a roller by the force of a coiled spring; and it consists- First, in making the tensionl of the coiled-up spring serve the purpose of keeping the journal-bearing of the roll-cr in place, and preventing its becoming loose by use.

Second, in so arranging the coiled spring in relation to the roller and its Abearings that the coils are distended to prevent friction against each other, and,iby the greater i'reedom of action thus obtained, enable a lighter spring, and one of fewer coils, to serve the purpose, while at the same time the force acquired by m this distension accomplishes another result, that -of retaining the roller in its proper position within the window' or door-frame, and, by yielding, `allows it to be removed and inserted with ease.'

-Thirdpit also consists in the mode of connecting the free end of the screen with the rail ofthe sash or door-casing, whereby a.close joint is formed,and it-is connected and disconnected with the greatest facility.

'In accompanying plate of drawings niy improvements in thehanging of rnosoiui'to-nettings are illustratcd- Figure 1 being aninside view of a window with a, mosquito-netting so hung therein.

Figure 2, a transverse vertical section, taken in the plane of the line as :v in iig. 1.4

Figure 3, a partial section, taken in the direction of' the length of the netting-roller.

'Figure 4, an elevation of a door and its frame, showing a mosquito-netting applied to it.

Figure 5 is a detached View of, the screw-bearing o.

I .Similar letters of reference indicate -like parts.

A, in the drawings, represents a window-frame, havingsliding sashes B and C, arranged as ordinary, to the lower rnil, a, of the lower lone, C, of which one end, 6,' of the mosquito-netting D is hung, .by hooking it over ixedpins d d of the sashffivhich vnetting is wound upon a roller, F', extending acrossthe 'entireavidth ofthe window, and hung at lcach end by its projecting journal-shafts or'pi'ns inl the side strips g of the same, so' as to freely turn,`from which roller, as the sash is raised, the mosquito-nettingrunwinds. One end of theroller F is bored out for a. portion ofits length, as seen at G in iig. 3, and within such-borev is placed a spiral or coiled spring,"H, secured by'v its out'eriend, g2, to the inside of the bore, and at itsinner end,h, to thejournal'shaftfof such end of the roller, which shaft extends through the centre .oi the spiral spring H, and into the smaller portion, ,'of the bore G, in which it can freely turn. The outer end of this shaft is made of al siquare or other equivalent shape, so that wbeninscrtcd in its Ascatof the window-strip g it will notutnrn. I

As the power of the spring is constantly exerted on its set or bearing, and with considerable force when it is suddenly wound up by'raising of theV sash Yto its full extent, it' is liable to become loosened by use, and this has necessitated the use of Ya; larger piece. of metal than can4 be used with convenience, in order 'toenable a. stronger'fnstening to be effected, either by mortising into the woodfor by 'duplicating the screws or pins. As

the mortising in a. bearing is objectionable, and as the projection ofthe metal far outside ofl the surface of thev wood prevcntsthe screen or netting from vfitting closely enough to exclude mosquitoes, I ohviate both objections and secure the requisite strength by niafking the bearing-piece in the forni of a screw, o, iig. 5, having a. recess` to receive the end pf the rodfin its'head, which also serves to enableit to be inserted by turning with a screwdriver or other suitable instrument. The piece, being vformed substantially like a Wood-screw, is inserted by simply pricking a hole with any sharp point, and by turning it in until the head orbearing-portion -is even with the surface of the casing, or sunkbelow it, if desired. The coiled spring is arranged on the rodi, so that when wound up, the force exerted to nncoil itself acts in a direction that tends to screw the bearing in, and hence't can never become loose by use.

By securing'the coiled orvspiral 'spring H at `one end to the roller, the other being attached to the shaftf,

it is obvious that as the mosquito-netting isunwound from the `roller'the springwill be correspondingly more.

tightly coiled about the shaftf, so that, lowering the window, the netting will be automatically wound upon the roller by the then unwinding of the said spring; or,.`ii' the netting is released from the sash, a similar result will' take place, the same spring, H, bysecuring it -to the shaft f, retaining 'the roller in position within the window-frame by the contractile force" exerted inthe direction of its length, and also enabling the roller to be readily inserted in or detached from the window atipleasure,V as is obvious without further explanation.

To insure this eiiect to its fullest extent, the spring requires to beelongated, so that the coils will not be in contact when in the window, which prevents the usual friction of one coil against another, and enables la spring of less power and extent to be used. l

As it is frequentlyneccssary todetach the netting from the sash orderto get access through the window, or to pass through in`V ease of its application to la door, a mode otconnection which l'is at once simple and easily made fast or uni'astened, .and one which is close enough vto exclude insects, 'is of great importance,

and this I accomplish by means of one or more eyes, t t, attached to, or, what would bejequiyalent thereto, madeA through the light strip to which the netting is attached, which eyes engage with a fixed pin or pins,'d d, in the' sash, or equivalent. ,'Thisi'enables the screen to be attached and detached with the utmost facility.

n iig. 4 myZ/improvement is shown as applied to a door-casing, substantially the same principle or mode of hanging for the -nettingfroller being employed, and therefore needing no particular explanation herein.

What I claimv as new, 'and desire to secure by Letters Patent, is

.Soconstructing and arrangingthe spring H with'the roller F and screw-bearing '0, .that the un'coiling force of said spring is exerted to tightenvthe bearings, and thecontractile force to keepthe screen in place, and' permit its renloval when required, 'substantially as described.

' EDWD SPAULDING.

' 'Witnessesz-l M. M. Lrymesrora ALEX. F. ROBERTS. 

